IHEP OpenIR  > 多学科研究中心
Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH
Liu, HC; Xia, JL; Nie, ZY; Ma, CY; Zheng, L; Hong, CH; Zhao, YD; Wen, W; Ma CY(马陈燕); Zheng L(郑雷); Hong CH(洪才浩); Zhao YD(赵屹东)
2016
Source PublicationMINERALS ENGINEERING
ISSN0892-6875
Volume98Pages:80-89
SubtypeArticle
AbstractThe bioleaching of pure chalcopyrite by thermophilic Archaea strain Acidianus manzaensis YN-25 under different constant pH was first comparatively investigated. Then the relevant sulfur speciation was analyzed by synchrotron radiation based X-ray diffraction (SR-XRD) and S K-edge X-ray absorption near edge structure ()CANES) spectroscopy. The acidity of the leaching solution was monitored at 3-h intervals to make it steady at pH 1.25, 1.50, 1.75, 2.00, 2.25 and 2.50, respectively. Leaching results showed that the copper ion extraction increased during chemical leaching but decreased during bioleaching when pH value decreased from 2.50 to 1.25. SR-XRD analysis showed that, during bioleaching, new elemental sulfur (5) phase was detected at all tested pH cases; new jarosite phase was detected at cases of pH 1.50 to 2.50; and jarosite gradually became a major phase when pH value increased. XANES analysis further showed that covellite was detected during bioleaching at cases of pH 1.25 to 2.00 at higher redox potential (ORP) value, while chalcocite and bornite were detected at cases of pH 2.25 and 2.50 at lower ORP value. These results suggested that the formation of S was mainly accounting for hindering the dissolution of chalcopyrite while the formation of bornite could accelerate the dissolution of chalcopyrite by A. manzaensis. (C) 2016 Elsevier Ltd. All rights reserved.
KeywordBioleaching Chalcopyrite Acidianus manzaensis Constant pH Synchrotron radiation XANES
DOI10.1016/j.mineng.2016.07.019
WOS KeywordELECTROCHEMICAL DISSOLUTION ; HINDERED DISSOLUTION ; OXIDATION ; THERMOPHILES ; CONCENTRATE ; MECHANISMS ; SPECIATION ; BORNITE ; COPPER ; IRON
Indexed BySCI
Language英语
WOS SubjectEngineering, Chemical ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000385603200011
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/260310
Collection多学科研究中心
Affiliation中国科学院高能物理研究所
Recommended Citation
GB/T 7714
Liu, HC,Xia, JL,Nie, ZY,et al. Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH[J]. MINERALS ENGINEERING,2016,98:80-89.
APA Liu, HC.,Xia, JL.,Nie, ZY.,Ma, CY.,Zheng, L.,...&赵屹东.(2016).Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH.MINERALS ENGINEERING,98,80-89.
MLA Liu, HC,et al."Bioleaching of chalcopyrite by Acidianus manzaensis under different constant pH".MINERALS ENGINEERING 98(2016):80-89.
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